Shared calendar via ActiveSync? When will it be possible to do this without 3rd party software?

Shared calendar via ActiveSync?  When will it be possible to do this without 3rd party software?

In our Exchange 2007 days we used to be able to view shared calendars via OWA on devices with an Internet Browser by adding the shared calendar primary SMTP address, like this:

https://mail.domain.com/owa/user@domain.com/?cmd=contents&module=calendar but looks like that functionality has been removed.

Any thoughts?

Jason Meyer